A constant area circular duct is connected to the convergent divergent nozzle exit. The air enters the nozzle from a tank at a pressure of 7 bar (ab) and temp. of 127°C. The pressure at the nozzle exit is 0.19 bar. If the temperature of the air is 3°C at the end of the duct, and the duct length is 17.5 diameter of the duct, find the friction co-efficient of the duct. Consider flow is adiabatic through a duct and isentropic in the nozzle.
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Use:
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M
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4fLm/D
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3
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0.522
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1.5
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0.136
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